Solids, Liquids And Gases

Question 1

How are the particles in a solid arranged?

Answer 1

Particles are close together
Arranged in a regular pattern
Can vibrate in a fixed position but cannot move

Question 2

How are the particles in a liquid arranged?

Answer 2

Close together (should be touching in a diagram)
More energy than in solid
Arranged randomly

Question 3

How are the particles in a gas arranged?

Answer 3

Very weak forces between particles

Very spaced out and have more energy

Question 4

What is required for decomposition?

Answer 4

A source of energy such as heat (thermal decomposition) or light or electricity (electrolysis)

Question 5

Electrolysis of water?

Answer 5

Water ➡ hydrogen + oxygen

Question 6

What is an element?

Answer 6

Something that contains only one type of atom

Each atom has the same number of protons

Question 7

What is a compound?

Answer 7

A combination of two or more elements in fixed proportions joined by bonds

Question 8

What is a molecule?

Answer 8

2 or more non metals which are chemically bonded (not only elements- possibly atoms too)

Question 9

What is a mixture?

Answer 9

Elements and compounds that are mixed together but not chemically bonded